--description--

You want your code to execute only once your page has finished loading. For that purpose, you can attach a JavaScript event to the document called DOMContentLoaded. Here's the code that does this:

document.addEventListener('DOMContentLoaded', function () {});

You can implement event handlers that go inside of the DOMContentLoaded function. You can implement an onclick event handler which triggers when the user clicks on the #getMessage element, by adding the following code:

document.getElementById('getMessage').onclick = function () {};

--instructions--

Add a click event handler inside of the DOMContentLoaded function for the element with id of getMessage.

--hints--

Your code should use the document.getElementById method to select the element whose id is getMessage.

assert.match(code, /document\s*\.getElementById\(\s*('|")getMessage\1\s*\)/g);

Your code should add an onclick event handler.

assert.isFunction(document.getElementById('getMessage').onclick);

--seed--

--seed-contents--

html

<script>
  document.addEventListener('DOMContentLoaded', function () {
    // Add your code below this line
    // Add your code above this line
  });
</script>

<style>
  body {
    text-align: center;
    font-family: 'Helvetica', sans-serif;
  }
  h1 {
    font-size: 2em;
    font-weight: bold;
  }
  .box {
    border-radius: 5px;
    background-color: #eee;
    padding: 20px 5px;
  }
  button {
    color: white;
    background-color: #4791d0;
    border-radius: 5px;
    border: 1px solid #4791d0;
    padding: 5px 10px 8px 10px;
  }
  button:hover {
    background-color: #0f5897;
    border: 1px solid #0f5897;
  }
</style>
<h1>Cat Photo Finder</h1>
<p class="message box">The message will go here</p>
<p>
  <button id="getMessage">Get Message</button>
</p>

--solutions--